Nottingham Forest are searching for a left-back to provide competition for Danny Fox.

With the transfer window closed, free transfers are now the only option for Aitor Karanka. Here, the Post looks at five players without clubs who could sign for the Reds.

1 Guilherme Siqueira

Pedro holds off Guilherme Siqueira during the La Liga match between Club Atletico Madrid and Barcelona in 2015 (Image: Getty)

A player who has enjoyed extensive success in La Liga, the 31-year-old was a 10m euro signing for Atletico Madrid in 2014.

An Italian citizen, he left Atletico last September after his contract was cancelled by mutual consent. He was set to miss the next two months with a knee injury, but is understood to be fit again and was last month linked with Serie A side Roma.

The Croatia international joined Olympiacos from Fiorentina last summer having played 17 times in Serie A. However, he struggled to break into the Olympiacos team this season and saw his contract terminated on Sunday, February 4, making him free to join someone else.

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Javier Garrido scores for Manchester City against Wolves in 2009 (Image: Getty)

The 32-year-old has been heavily linked to Forest in the last few days. He has extensive experience in England with Manchester City and Norwich City and is without a club after leaving Cypriot side Larnaca.